Double acting pump



Dec. 16, 1958- A. N. VERRUE DOUBLE ACTING PUMP Filed Jan. 31, 1958 Z/ 6 2 m 4 3 T u 2 mmmw M e M V l k N V W? A 5 V 8 n 3 5 a w 62 m I 7 3 4/ l I 2 /a z 7 ATTORNEY Patented Dec. 16,

DOUBLE ACTING PUMP Alfred N. Verrue, Phoenix, Ariz.

Application January 31, 1958, Serial No. 712,393

Claims. Cl. 103-445 This invention relatesto a novel double acting pump or compressor of extremely simple construction including a movable part capable of being rocked back and forth for expelling a medium being pumped for one part of the pump while simultaneously drawing a medium to be pumped into another part of the pump to be thereafter expelled when the movable part is rocked in the opposite direction.

Another object of the invention is to provide a pump or compressor of extremely simple construction which is composed of a minimum number of parts and wherein certain of the parts are adjustable relative to one another to compensate for wear.

A further object of the invention is to provide a pump having novel means for sealing the pumping chambers thereof. I

Various other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawing, illustrating a presently preferred embodiment thereof, and wherein:

Figure 1 is a top plan view of the pump;

Fig. 2 is an enlarged vertical sectional view thereof, taken substantially along a plane as indicated by the line 2--2 of Figure 1, and

Figure 3 is a fragmentary vertical sectional view of the lower portion of the pump, taken substantiallly along a plane as indicated by the line 3-3 of Figure 2.

Referring more specifically to the drawing, the double acting pump in its entirety is designated generally 6 and includes a housing, designated generally 7, which is composed of a base 8, a shell 9, a connecting ring 10 and an annular sealing gasket 11.

The base 8 comprises a relatively thick disc having a threaded periphery 12. Said base or disc 8 is drilled to provide two multiple passages 13 and 14, as seen in Figure 2, each having an end portion 15 which opens through the upper surface of the base 8, and end portions 16 and 17, each of which connects with the portion 16 and each of which opens outwardly of another exposed surface of the base 8. The end portion 16 constitutes the inlet passage and is provided with an inwardly opening check valve 18 and the end portion 17 constitutes the outlet passage or port and is provided with an outwardly opening check valve 19. The upper surface 20 of the base 8, through which the passages 15 open, is substantially flat except for a groove 21 which is semicircular in cross section and which extends diametrically across the base 8 and is disposed between the multiple passages 13 and 14.

The shell 9 is substantially hemispherical and is externally enlarged and internally recessed as seen at 22 at its open side or bottom. The annular wall 23 of the recess 22 is threaded. The inner surface 24 of the remainder of the shell 9 has a radius approximately equal to the radius of the base 8. The top portion or apex of the shell 9 is provided with an elongated slot 25.

A nearly hemispherical piston 26 is mounted in the housing 7 and has substantially flat faces 27 and 28 which are disposed at an angle slightly less than to one another. The piston 26 has a rib 29 whichextends diametrically thereacross and which is disposed between the faces 27 and 28 and which is nearly semicircular in cross section and of a proper diameter to fit in the groove 21, in which said rib has a limited oscillating movement. The diameter of the outer hemispherical surface 30 of the piston 26 has a radius only slightly less than the radius of the inner shell surface 24 so that the surface 30 has a close fitting engagement with the shell surface 24. v The piston 26 is provided with one or two endless grooves 31 which open outwardly of the surface 30 thereof in which are mounted sealing rings 32 to prevent leakage between the faces 24 and 30.

To assemble the pump 6 the connecting ring 10 is threaded onto the threaded periphery 12 of the base 8 and so as to be disposed above the outwardly opening ends of the inlet passages 16, but beneath and spaced from the top surface 20 of the base. Said ring 10 is preferably provided with spanner tool receiving sockets 33, by means of which the ring can be applied to or removed from the base. The sealing gasket 11 is then applied around the upper portion of the base 8 so as to rest on the connecting ring 10, after which the piston 26 is positioned on the upper side of the base 8 with' the rib 29 thereof engaging in the groove 21. The shell 9 is then applied over the piston 26 and is screwed down onto the connecting ring 10, as illustrated in Figures 2 and 3, until its inner surface 24 is disposed in relatively close fitting contact with the piston surface 30. With the shell 9 thus disposed, the downwardly facing shoulder 34 of its recess 22 will bear on the upper side of the sealing gasket 11 for compressing the sealing gasket to some extent between said surface 34 and the connector ring 10. The shell 9 is adjusted relative to the ring 10 and base 8 so that the elongated opening 25 thereof is disposed crosswise of the groove 21, as seen in Figure 2.

The piston 26 has a threaded socket 35 opening outwardly of the apex thereof in which the threaded end 36 of a lever 37 is detachably mounted, after the housing 7 has been assembly with the piston 26 therein. The lever 37 projects outwardly through and is loosely disposed in the opening 25 and has an opposite end portion forming a handgrip 38.

The pump 6 is operated by an oscillating motion being imparted to the lever 37 from right to left and left to right of Figures 1 and 2. As the piston 26 is moved counterclockwise by right to left movement of the lever 37, as seen in Figure 2, the medium to be pumped contained within the constricting chamber between the pis ton face 28 and the base portion 20 located therebeneath will be forced downwardly through the passage 15 of the multiple passage 14, past the check valve 19 and through the outlet port 17 of said multiple passage 14. At the same time, the piston face 27 will be moving away from the other half of the top surface 20 to produce a suction in the expanding chamber thus formed and so that the medium to be pumped will be drawn inwardly through the inlet port 16 of the multiple passage 13, past the check valve 18 and into the chamber formed between the piston face 27 and base 8. Thus, as the piston 26 is rocked in the opposite direction or clockwise as seen in Figure 2, the medium will be expelled through the outlet port 17 past its check valve 19 of the multiple passage 13 in the same manner as previously described in connection with the multiple passage 14, and at the same time another charge of the medium to be pumped will be drawn into the expanding chamber formed by the upwardly moving piston face 28, past the inwardly opening check valve 18 of the inlet 16 of the multiple passage 14. It will thus be seen that a double acting pump of extremely simple construction has been provided and 3 that the rib 29 which fulcrums in the groove 21 additionally forms a seal between the two piston faces 27 and 28.

It will also be apparent that the connecting ring 10 can beadjusted *on the threaded periphery 12 of the base 8 to lower-theshell 9 slightly withrespect to the baseto compensate for wear on the surfaces 24 and 30 andto maintain a, proper close fitting working engagement between said surfaces. A

'While theoutlet'ports 17- are-shown opening outwardly of-the'underside of the base 8,;it will be understood that said ports 17-could*open outwardly ofthe periphery 12 at .orbelow the levelof the-openouter ends of the inlet passages'16.

It will also be apparent that the-lever 37 can be reciprocated otherwise than manually, as described, for operating thelpump 6.

Various other modifications and changesare contemplated and may be resorted to without departing from the function or scope of the invention as hereinafter defined by the appended claims.

I claim as my invention:

1. A double acting pump comprising a housing including a substantially flat base and a substantially hemispherical shell combining with said base to form a substantially hemispherical chamber, a nearly hemispherical piston mounted in said chamber having substantially flat piston faces disposed at an angle-of less than 180 to one another and facing said base, said piston having a rib extending diametrically thereacross of-substantially semicircular cross section, said rib being disposed between said piston faces, said base having an inner side provided with a diametrically extending :groove of substantially semicircular cross section in which said rib is mounted for limited oscillating movement, said base having a' piston, said shell having an elongated opening in the apex thereof disposed crosswise of the groove of the base in which a portion of the lever is disposed for oscillating movement, said piston being oscillated with the lever relative to the housing to cause the piston faces thereof to alternately swing toward the inner side of the base for executing a pumping stroke and to alternately swing away from said inner side of the base to execute a suction stroke.

2. A double "acting pump as in claim 1, said base comprising a relatively thick disc having a threaded periphery, and an internally ande'xternally'threaded connector ring threadedly mounted on the periphery of the base and'onto which the open end of said shell is threaded for connecting the base andshell.

3. A double acting pump as in claim 2, and an annular sealing gasket supported between portions of the base and shell and portions of the shell and connecting ring for sealing the 'outer portion of the'housing.

4. A double actingpump as in claim 3, said shell and piston having conformably engaging substantially hemispherical surfaces disposed in close fitting Working engagement with one another, and said connector ring being adjustable on the periphery of the base for adjusting the shell relative to the base to compensate for wear between the working surfaces of the shell and piston.

5. A double acting pump as in claim 4, said piston having at least one endless sealing ring. projecting from the hemispherical surface thereof and disposed in yielding contact with the inner surfaceof the shell.

References Cited in the file of this patent UNITED STATES PATENTS 249,996 Richards Nov. 22, 1881 540,492 Homes June 4, 1895 714,874 Davis Dec. 2, 1902 961,618 Keller June 14, 1910 2,073,385 Blocker Mar. 9, 1937 2,359,819 Bachrach Oct. 10, 1944 FOREIGN PATENTS 577,656 Great Britain May 27, 1946 

